Lock



FIG. 1 is a front perspective view of a lock showing our design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a front perspective view, the lock showing a different boltlatch assembly thereof.

The broken lines in the Figures are for illustrative purposes only andform no part of the claimed design.

The ornamental design for a lock, as shown and described.